Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9eafdf520db5bf3487a3a89c73ff8002a151848146f422513a853e8a69954bf3' 
  AND token = '7cV7RaKfSxTvLNLpeMJUFt/m84UKFtq04/oXMx0wn9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}